Bis(tetrabutylammonium) dichromate Chemical Properties

Melting point:

139-143 °C (lit.)

solubility 

sol dichloromethane, chloroform.

form 

powder to crystaline

color 

Light yellow to Brown

Water Solubility 

Soluble in water.

Exposure limits

OSHA: Ceiling 0.1 mg/m3
NIOSH: IDLH 15 mg/m3; TWA 0.0002 mg/m3

Safety Information

Hazard Codes 

O,T,N

Risk Statements 

49-8-43-50/53

Safety Statements 

53-45-60-61

RIDADR 

UN 1479 5.1/PG 2

WGK Germany 

2

F 

8

HazardClass 

5.1

PackingGroup 

III

HS Code 

29319090

MSDS

• Language:English Provider:SigmaAldrich

Bis(tetrabutylammonium) dichromate Usage And Synthesis

Uses

Reagent for:

• Preparation of nitrophenol derivatives and quinones under aprotic reaction conditions
• Conversion of oximes to carbonyl compounds under microwave irradiation

• Catalyst precursor for catalytic gas phase dehydration of acetic acid to ketene
• Crosslinking agent

Application

Bis(tetrabutylammonium) Dichromate (TBADC) is a mild selective oxidizing agent for benzylic and allylic alcohols^[1]. It can oxidize carbon-halogen bonds^[2].

Preparation

Preparative Method of Bis(tetrabutylammonium) Dichromate (TBADC): a concentrated aqueous solution (300 mL) of Potassium Dichromate (29.4 g, 0.1 mol) is added to a saturated aqueous solution (300 mL) of Tetra-n-butylammonium Bromide (64.4 g, 0.2 mol). TBADC precipitates and can be removed by filtration (62.8 g, 90% yield).

storage

Bis(tetrabutylammonium) dichromate was reported to be a toxic agent. The reagent should be handled in a fume hood.

Purification Methods

Wash it with water and dry it in a vacuum. Recrystallise it from hexane (m 79-80o). [Santaniello & Ferraboschi Synth Commun 10 75 1980, Beilstein 4 IV 556.] (Possible CARCINOGEN.)

References

1. (a) Santaniello, E.; Ferraboschi, P. SC 1980, 10, 75. (b) Luzzio, F. A.; Guziec, F. S. OPP 1988, 20, 533.
2. Landini, D.; Rolla, F. CI(L) 1979, 213.

Bis(tetrabutylammonium) dichromate(56660-19-6)Related Product Information

• Tetrabutylammonium hydrogen sulfate
• Tetrabutylammonium hydroxide
• Tetrabutyl ammonium chloride
• Ammonium dichromate
• Tetrabutylammonium fluoride
• Tetrabutylammonium perchlorate
• Tetrabutylammonium bromide
• TETRABUTYL AMMONIUM BROMIDE
• Tetraethylammonium hydroxide
• Chromic acid
• DIETHYLDIMETHYLAMMONIUM HYDROXIDE
• AMMONIUM CHROMATE
• Tetramethylammonium hydroxide pentahydrate
• CHROMIUM (III) OXIDE HYDRATE
• Tetrapropylammonium hydroxide
• Viridian 3B
• chromium dioxide
• Sodium dichromate dihydrate